3 dueces are neat and if mechanical linkage can be adjusted to run 60 mph or so on the middle duece in high gear. Or whenever you want. Does the intake ports match up with the head ports. They probably do but Edelbrock made a 355 for 265 cubic inch sbc that had smaller ports and will not match up with later heads --- air leaks. They also made a 357 that did. Not sure if Offenhauser had the same diff manifolds.
Your problem may be air leaks or too much gas. As said above, block off the front and back, unfasten linkage and see how it runs on just the middle. If not fine, check for air leaks or carb problems. If ok, then unblock one of the front or rear, leave linkage off and close port. Narrow down which carb is the problem. Rebuilds on 2Gs or 2 GCs are easy once they are clean.
It should only choke and idle on the middle duece. The ends are just dumpers unless someone has 3 centers on it. If so go back to the 4 barrel or make dumpers out of the end ones. So synching them is not as much an issue.
Last edited by 42465967; 10/19/2016 3:18 PM.
